On Tue, Nov 22, 2016 at 12:23:53PM -0800, Tim Chen wrote:
> We generalize the scheduler's asym packing to provide an ordering
> of the cpu beyond just the cpu number. This allows the use of the
> ASYM_PACKING scheduler machinery to move loads to preferred CPU in a
> sched domain. The preference is defined with the cpu priority
> given by arch_asym_cpu_priority(cpu).
>
> We also record the most preferred cpu in a sched group when
> we build the cpu's capacity for fast lookup of preferred cpu
> during load balancing.
>
> Co-developed-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
> Signed-off-by: Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>
With the two little edits below:
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
> ---
> include/linux/sched.h | 4 ++++
> kernel/sched/core.c | 15 ++++++++++++++
> kernel/sched/fair.c | 54 +++++++++++++++++++++++++++++++++++----------------
> kernel/sched/sched.h | 6 ++++++
> 4 files changed, 62 insertions(+), 17 deletions(-)
>
> diff --git a/include/linux/sched.h b/include/linux/sched.h
> index 348f51b..ca02475 100644
> --- a/include/linux/sched.h
> +++ b/include/linux/sched.h
> @@ -1057,6 +1057,10 @@ static inline int cpu_numa_flags(void)
> }
> #endif
>
> +int arch_asym_cpu_priority(int cpu);
extern
> +int arch_asym_max_cpu_and(const struct cpumask *mask1,
> + const struct cpumask *mask2);
> +
And that needs to go too; that function no longer exists.
> struct sched_domain_attr {
> int relax_domain_level;
> };
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